Well device



Sept. 9, 1941. H 'Q 0T|s 2,255,451

wELL DEVICE v Filed July 27, 1958 l 2 Sheets-Sheet l vlll E H. C. OTISWELL DEVICE Sept. 9, 1941.

Filed Juiy 27, 1958 I 2 sheets-sheet 2,

. Patented Sept. 9, 1941 sTATEs PATENT oFiFlcE WELL DEVICE Herbert '0.otis, Dallas, Tex.

Application July 27, 193s, serial No. 221,578 22 claims. (cl. 1st- 12)This invention relates to new and useful improvements in well devices. A

One object of the invention is to provide an improved well device forsealing oi the annular I space between a well casing and a well tubing,

whereby the flow of well liquid is directed upwardly through the Welltubing.

An important object of the invention is to provide an .improved welldevice including a packer which is normally mounted on the well tubingand.

whereby the weight of the well tubing string need not be utilized tomove and hold 'the element in sealing position; said. packing alsoybeing retractible from its sealing position by equalization of uidpressure thereacross, whereby the strain placed on the tubing in pullingthe element from its sealing engagement with the casing wall, as is theusual practice, is eliminated.

Another object of the invention is to provide an improved well packerhaving a duid-pressure actuated packing element and means for shuttingoff the fluid pressure from the element, while the device is beinglowered through-the well casing, whereby accidental or unintentionaldistortion of the element into sealing position is positively prevented.

A further object of the invention is to provide an improved packer, ofthe character described, wherein the well tubing is capable of 'alimited movement with relation to the packer, whereby in the event thewell connections become broken A construction designed to carry out theinvention will be hereinafter described, together with other features ofthe invention.

The invention will be more readily understood from a reading of thefollowing specincation and by reference to the accompanying drawings, in

which an example of the invention is shown, and wherein: l

Figure 1 is a view, partly in elevation and partly in section, of a welldevice, constructed in accordance with the invention and showing thesame being lowered through a. well casing,

Figure 2 is a similar view showing the packing element of the device inits set position,

Figure 3 is an enlarged transverse, vertical, sectional view of thepacking element and its associate parts,

Figure 4 is an enlarged horizontal, cross-sectional view taken on theline 4-4 of Figure 1,

Figure 5 is an enlarged horizontal, cross-sectional view taken on theline 5--5 of Figure 1.

l Figure 6 is an enlarged horizontal, cross-sectional view taken on theline 6-6 of Figure 1,

Figure 'l is a horizontal,.crosssectional view taken on the line 'I-I of-Fig'ure 2, and- Figure 8 is an enlarged isometric view ofthesu'spension collar which connects the tubing with the packingassembly.

In the drawings, the numeral I0 designates an elongate mandrel havinganl axial bore II extending therethrough. The upper portion of the outersurface of the mandrel is substantially cylindrical and a slipsupporting sleeve or carrier I2 is slidable longitudinally on thisportion. Acollar I0' is threaded on the extreme upper'end of the mandreland limits'the upward movement of the sleeve on said mandrel. The sleeveI2 is' formed with an outwardly directed,v annular and the well pressureis uncontrolled, the packer means of a suitable fishing tool, or othermeans.

flange I3 and an external collar I4 is preferably made integral with itslower end. 'I'he collar has a plurality of radial slots I5 therein(Figures 1 and 4), which slots are spaced equidistant there;I

around andthe upper ends of gripping elements I6 are inserted within theslots. Each slot is substantially T-shape and the upper end of eachgripping element has a. cross-arm I6', wherebythe elements are suspendedfrom the collar Il. Outward displacement ci' the upper ends of saidelements 'is prevented by a retaining ring I'I which is inserted withinan annular groove I 8 provided on the exterior of the collar I 4. Sincethe sleeve I2 is slidable on,the,mand rel, the gripping elements I6 aremovable longitudinally on said mandrel and are also capable of limitedlateral or radial movement with relation thereto.

The sleeve I 2 is formed with an L-slot I9 which is located between theflange I3 and collar I4 and a radial pin 20 extending outwardly from theexterior of the mandrel I engages within this slot and connects themandrel and sleeve. W'hen the pin is within the lateral or horizontalportion ISa of the slot, the sleeve I2 is in a raised position on themandrel and said sleeve and mandrel are movable as a unit. By rotatingthe mandrel to aline the pin with the vertical portion I9b of the slot,said mandrel may be moved upwardly with relation to the sleeve, the pintraveling upwardly in the slot. To hold the sleeve stationary when themandrel is moved upwardly therethrough, a plurality of friction springs2| have their upper ends fastened to the collar I4 between the grippingelements I6 and are bowed outwardly to frictionally contact the innerwall of the well casing A.

The outer surface of the lower portion of the mandrel II) is iiared orinclined outwardly to form a slip expanding portion 22. Each grippingelement I6 includes an arcuate slip 23 made integIal with its lower endand the outer surface of each slip is formed with the usual grippingteeth. The inner surface of each slip contacts the inclined surface 22of the mandrel and manifestly, as the slip carrier or sleeve I2 moveslongitudinally of the mandrel, the slips. are moved radially of saidmandrel. When the slips are at the lower end of the inclined portion 22,said slips are in -an expanded position and the gripping teeth thereofare adapted to engage the inner wall of the well casing A, as will beexplained.

The lower portion of the mandrel IIJ is' enlarged below the slipexpanding surface 22,

whereby an external, annular shoulder 2l is formed. The lower end of thebore II of said mandrel is also enlarged at II' to provide an internal,annular shoulder 25 and this enlarged portion of the lbore is internallyscrew-threaded to receive the upper end of a supporting sleeve 26. Aflexible packing element or sleeve 21 surrounds the supportingsleeve andhas its upper reduced end coniined within an annular recess 28 which isprovided in the extreme lower end of the mandrel. 'Ihe lower end of thepacking element is reduced and disposed within a thimble 29 which has anaxial screw-threaded bore 30, whereby said thimble may be attached tothe lower end of the supporting sleeve 26. It is noted that the lowerend of the bore 30 is reduced to form an internal shoulder 30', againstwhich the lower end of the sleeve 26 may abut and it is preferable thatthe diameter of this reduced portion of the `bore be substantially thesame as the diameter of the bore of said sleeve.

-When the ilexible packing element 21 is in a normal, undistortedposition its bore 21' engages the exterior surface of the supportingsleeve 26 and its outer surface is retracted from the wall of the wellcasing A, as shown in Figures 1 and 3. The sleeve 26 is formed with aplurality of radial ports 3| which are spaced radially andlongitudinallythereof, and manifestly, when a pressure is present withinthe bore of the sleeve 26, such pressure will act through the portsagainst the packing element 21, whereby said element is distorted ormoved to a sealing position with its outer surface engaging the wall ofthe well casing A (Figure 2). When the pressure within the sleeve 26 isrelieved or is less than the pressure exteriorly of the packing element21,

' then the inherent resiliency of the material of which the element isconstructed returns said element to a retracted or undistorted position.

The usual well tubing B which extends axially through the well casing Apasses through the bore II of the mandrel I0 and its outer vdiameter issubstantially the same as the diameter of the bore. The tubing extendsdownwardly through the supporting sleeve 26 and has its lower endprovided with external screw threads, which are preferably left-handedthreads. A suspension collar 32 which is arranged to be detachablyconnected to the lower end of the sleeve 26 of the packer assembly, aswill be explained, has the upper end of its bore formed withcomplementary left-hand screw threads to receive the lower end of thetubing. Since the bore of the mandrel is enlarged at its lower end andalso since the sleeve 26 is secured in this enlarged portion Il', itwill be obvious that an annular space 33 /is provided between the tubingand the sleeve.

For packing off between the well tubing B an the bore Il of the mandrel,a pair of spaced, an-

nular grooves 34l are formed in the wall of the mandrel bore above theinternal shoulder 25.

A pressure seal packing ring 35, constructed of exible packing material,is inserted in each groove and has its inner periphery engaging theexterior of the well tubing. The bottom of each ring is V-shape incross-section, whereby a pressure from below said rings will tend todistort said rings into tighter sealing engagement with the tubing. Thepacking rings 35 eficiently pack off around the tubing, while permittinga vertical or sliding movement of the tubing through the mandrel withoutbreaking the seal.

As has been explained, the lower end of the tubing B is screw-threadedinto the upper -end of the suspension collar -32 which collar is formedwith a radially extending lug or projection 36 (Figure 8), which ispreferably angular in crosssection. The lug is located near mid-heighton the exterior of the collar and is adapted to engage within aninverted L-shaped slot 31 which is provided in the bottom of thesupporting sleeve 26, as is clearly shown in Figure 3. The slot has ahorizontal or lateral portion 31a and a. vertical portion 31b, thelatter being open at its bottom and, manifestly, when the lug is withinthe horizontal portion, the collar 32 is immovable with relation to thethimble 29 and packer assembly. By rotating the collar 32 to aline thelug 36 with the vertical portion 31h of the slot 31, the collar may bemoved downwardly from the Ibore of the sleeve 26 and thimble.

The external diameter of the *collar is substantially the same as thediameter of the bores of the sleeve 26 and thimble and when locked inposition, with the lug 36 engaging the horizontal portionV 31a of theslot, the upper portion of the collar is within the sleeve and thimble,while the lower end of said collar projects therefrom. To pack oirbetween the upper portion of the collar and the bore of the sleeve.26,the collar has an external annular groove 38' which receives a suitablepacking ring 38. The outer periphery of said ring engages the. bore ofthe sleeve and prevents pressure from below the packer assembly fromentering the annular space 33 between the tubing and sleeve. Thus, whenthe collar is locked in position within the sleeve 26 and thimble 29,the well pressure from the well casing below the packer cannot enter thesleeve to distort the packing element 21 into sealing position. Thelower end of the bore of the suspension collar 32 is screw-threaded andthe upper end of a length of pipe or tubing 39 vtance of pressure frombelow the device.

is secured thereto. The lower end of this pipe is perforated, as shownatl t0,v or the usual well screen (not shown) may be connected thereto.With such arrangement, it is manifest that the well liquid may enter theperforations 40 and ow upwardly through the pipe 39, collar 32 and welltubing B to the surface.

In operation, the packer assembly is mounted on the well tubing B and isconnected thereto by means of the suspension collar 32, to which thelower tubing end ofthe tubing is attached by means of the left-handthreads. The radial lug 36 on said collar is engaged within thehorizontal portion 31a of the L-shaped slot 31, in the lower end of thesleeve 26, and as the tubing is run downwardly into the well, themandrel I and packer assembly carried thereby is moved with saidltubing. At this time, the gripping slips 23 are in their retractedposition with the slip carrier sleeve I2 being held in its uppermostposition on the mandrel I by the radial pin 20 on the mandrel engagingwithin the horizontal portion I9a of the slot I9 in said sleeve. Thus,the tubing is utilized to run the .device into the well casing A andduring the lowering operation, the slips are retracted.

The packing element 2l is also in its normal or undistorted positionduring such lowering operation since pressure cannot enter the bore ofthe supporting sleeve 26 because the packing ring 38 on the suspensioncollar 32 prevents admit- Any pressure within the well casing A will acton the past the sealing rings 35 and such leakage would' result in apressure within the sleeve 2S. This slight pressure is desirable duringlowering of the device to obviate the danger of the pressure, actingagainst the exterior of the element 2l, forcing and distorting saidelement through the openings 3l. However, it isnoted that a relativelyhigh pressure outside the element 2l would be necessary to accomplishthis and under ordinaryconditions, it would make no difference whetheror not a pressure is present within the sleeve 2S during the lowering 0fthe device.

When the assembly has been lowered within the casing to the position atvwhich the packing element 2l is to be set, the tubing B is rotatedl in aclockwise rotation in Figure 7, which rotates the' suspension collar 32to move the lug 36 on said collar to the end of the horizontal portion31a of the slot 31 .in the sleeve 26 and alines said lug with thevertical portion Slb of the slot. At this time, the mandrel l0 and slipcarrier i2 are held against rotation by the friction springs 2l on saidcarrier. When the lug 3B strikes the end wall of the slot 3l, furtherclockwise rotation of the tubing B will impart a rotation to the mandrell0 and as said mandrel Uil rotates, the radial pin thereon moves to theend of the horizontal portion i911 and is alined 'with the verticalportion iSb of the slot i3 in the slip carrier sleeve l2, said sleevebeing held against rotation by the friction springs 2l. As soon as thepin 20 is alined with the vertical portion of the slot I 9, the tubingis raised, whereby the mandrel Ill is moved upwardly with relation tothe sleeve i2, the pin moving upwardly in the slot i9. Upward movementof the mandrel with relation to the sleeve raises the inclined slipexpanding surface 22 between the gripping elements I6, whereby the slips23 are moved radially outward to engage their gripping teeth with thewall of the well casing A. Engagement of the grippingteeth with thecasing prevents further upward movement ofthe mandrel Ill and tubing Band since the well pressure is acting against the bottom ofthe packerassembly, said assembly is locked in the well casing. It is noted thatduring the locking operation, the suspension collar 32 is within thelower end of the sleeve 26 and the packing ring38 prevents admittance ofpressure into said sleeve.

After the assembly is locked within the casing A by the slips 23, thetubing B is moved downwardly through the mandrel. Suchdownward movementis permitted since the lug 36 on the collar 32 has previously beenalined with the vermandrel may enter the annular space 33 between loutersurface of the undistorted packing element the sleeve 26 and 'tubing B.'Ihis pressure cannot pass upwardly through the bore Il of the mandrelbecause of the pressure seal packing rings 35 and, therefore, suchpressure is confined within the space 33, whereby it acts through theopening 3l against the inner surface 0f the packing element 2li todistort the sameinto sealing position. When in sealing position, theouter surface of the element 2l engages the wall of the well casing and,manifestly, the well fluids cannot pass upwardly thereby, Neither canthe fluids flow upwardly through the bore of the mandrel, l

and therefore, said fluids enter the perforations l0 and pass upwardlythrough the pipe 39 and well tubing B to the surface.

With" the packing element in its set position, the tubing B may be movedvertically through the assembly and the packing rings 35 hold the sealduring such movement. This makes it possible to position theperforations d@ opposite the desired strata in the well bore after thepacker has been set. To permit maximum movement of the tubing, ush jointtubing may be employed. If theusual external couplings are used in thetubing string, then the movement of the tubing is limited to the lengthof one section as the coupling (not shown) rst above the mandrel willstrike the cap i u at the upper end of the mandrel to limit furtherdownward movement. It is noted that when outside couplings are employed,it is desirable that the distance from the assembly in its set positionto the bottom of the well bore be greater than the distance from the topof the mandrel to the iirst coupling thereabove, whereby said couplingwill strike the mandrel before the lower end of the pipe 39 strikes thebottom of the hole.

When it is desired to remove the packer, the pressure across the packingelement 2 is equalized by creating a pressure above and exteriorly ofthe element, which is equal to the pressure below and within theelement. This may be done by pumping a pressure fluid downwardly intothe well casing from the surface or by by-passing the well pressure frombelow around the packer. This latter method, which is that of by-passingthe well fluid pressure around the element will be hereinafterexplained.

When a pressure` uid is pumped downwardly into the casing to create apressure eXteriorly of the element, such pressure 'may be equal to, or

greater than, the pressure within the element. If said pressure isgreater, it will tend to force the element inwardly from sealingposition, whereby the inherent resiliency of said element need not bedepended upon to retract the same. The well tubing B is then raised tolift the suspension collar 32 so that its lug 36 enters within thevertical portion of the slot and moves upwardly therein.

Rotation of the tubing in a counter-clockwise.

direction (Figure 7) moves the lug 36 into the horizontal portion of theslot to again connect the tubing and mandrel. It is noted that as soondisengage from the casing A. When the mandrel I has moved downwardly asuilicient distance to lower the pin to th'e bottom of the verticalportion I9b of the slot I9, said mandrel is rotated to engage the pinwithin the horizontal -portion I9a of said slot, whereby the carriersleeve I2 is again locked to the mandrel to lock the slips in aretracted position. The tubing may then'be raised and the entireassembly removed from the well casing A.

If for any reason the teeth of the slips 23 have become so iirmlyengaged with the casing wall that it is not possible to disengage themby connecting the collar 32 to the sleeve 26 and thereby permitting theweight of the tubing to act downwardly on the mandrel through the pin36, then the collar 32 may be disengaged and the tubing lowered untilthe tubing coupling first above the mandrel strikes the collar I0 at theupper end of the mandrel. The weight of the tubing string may then beutilized to jar downwardly on the mandrel to release theslips, afterwhich the collar 32 is re-engaged with the slot .31 and the slips lockedin a retracted position, as

has been explained, whereby removal of the device may be accomplished.

The lug 36 on the collar 32 may be accidentally sheared or broken oiwith the result that the connection between the collar and mandrel, asabove described, could not be made. To provide an auxiliary means ofconnection, the collar 32 has a plurality of upstanding projections orlugs 4I which are arranged to engage within complementary slots orrecesses 42 (Fgure 3) formed in the internal shoulder 25 in the bore ofthe mandrel I0. If the lug 36 is broken oii or sheared, then in removingthe assembly from the casing,

projections 4I engaging the recesses 42. After the tubing is removed, asuitable shing tool or jar (not shown) may be run into the casing. Thetool may be engaged beneath the ilange I3 on the carriersleeve I2 andthe mandrel may be jarred downwardly by suitable means. After the slipsare released, the fishing tool is raised upwardly which raises thesleeve I2 on the mandrel and engages said sleeve with the collar I0 onthe upper end of said mandrel. The assembly may thus be lifted to thesurface.

The foregoing description ofthe invention is explanatory thereof andvarious changes in the size, shape and materials, as well as in thedetails of the illustrated 'construction may be made,

within the scope of the appended claims, without departing from thespirit of the invention.

What I claim and desire to secure by Letters Patent is:

l. A well device including, a tubular packer mounted on a well tubingand movable with relation thereto, means for detachably connecting saidtubing and packer, whereby the tubing may be utilized to move saidpacker in either direction within the well, so as to locate said packerin a desired position therein, means for anchoring the packer in asealing position within the well, whereby the tubing may be disconnectedtherefrom an'd moved therethrough to vary the elevation of the liquidinlet of said tubing in the well bore, and packing elements between thepacker and the tubing at each end of the packer.

2. A well device including, a packer having a pressure expansiblepacking element, means for anchoring the packer in position within thewell bore, means to admit iiuid pressure to said element to distort thesame into sealing position, a well tubing extending axially through saidpacker and being movable with relation thereto when said packer isanchored to vary the elevation of the liquid inlet of said tubing in the\well bore, and means for locking the packer dithe tubing B is rstlowered so that its coupling (not shown) strikes the mandrel and jarsthe same downwardly to retract the slips 23. The tubing isr then raiseduntil the projections 4I engage within the recesses 42, after which themandrel III may be rotated to engage the pin 20 within the horizontalportion I9a of the slot I3 to lock the slips in a retracted position.The tubing may then be raised to remove the assembly from the casing.

If, for any reason, it is not possible to remove the packing assemblyfrom the casing by means of the tubing B, then said tubing may bedisconnected from the collar 32 by rotating the same so as to unscrewthe left-hand threadconnection between the collar and tubing. Duringsuch rotation,` the collar 32 may be held against rotation either by thelug 36 engaging the slot 31 or by the rectly to the tubing.

3. A well device including, a packer having a pressure expansiblepacking element, means for anchoring the packer in position within thewell bore, means to admit fluid pressure to said element to distort thesame into sealing position, a well tubing extending axially through saidpacker and being movable with relation thereto when said packer isanchored to vary the elevation of the liquid inlet of said tubing in the`well bore, and means for packing off between the tubing and packer toprevent leakage therebetween.

4. A well device including, a packer having a pressure expansiblepacking element, means for anchoring the packer in position within thewell bore, means to admit iluid pressure to said element to distort thesame into sealing position, a well tubing extending axially through saidpacker and being movable with relation thereto when said ypacker isAanchored to vary the elevation of the liquid inlet of said tubing inthe well bore, and means carried by the tubing for shutting off theadmission of fluid pressure to the element during the lowering of thepacker in the well bore and being arranged to be moved when the tubingis moved relative to the packer after the latter is anchored to admitfluid pressure to said packing element for expanding the same.

v5. A well device including, a tubular mandrel, a flexible packingelement on the mandrel, means for detachably connecting the mandrel to awell tubing so that such tubing may be utilized to move the mandrel ineither direction within a well casing so as to locate said mandrel andpacker in a desired position therein, means carried by the mandrel forlocking said mandrel in a set position in said well casing, whereby thetubing may be disconnected from the mandrel and moved therethrough tovary the position of the liquid inlet of the tubing in the well, andpacking elements between the packer and the tubing at each end of thepacker.l

6. A-well packer including, a mandrel, a distortable packing elementcarried by said mandrel, means for slidably connecting a well tubing tosaid mandrel whereby said tubing may be utilized to lower the mandrelthrough a well casing, means on the mandrel for positively anchoringsaid mandrel and packing element in the casing, and means to admit aiiuid pressure `tothe packing to distort the same into sealing position.

7. A well device including, a well tubing, a tubular packer mounted on awell tubing and movable with relation thereto, means for detachablyconnecting said tubing whereby the tubing may be utilized to lower saidpacker inthe well, means for positively anchoring the packer in asealing position within the well, whereby the tubing may .bedisconnected therefrom and moved therethrough to vary the elevation ofthe liquid inlet of said tubing in the well bore, and means for shutting01T the admission of iiuid pressure to the packer during the loweringoperation to prevent premature setting thereof.

8. A well packer including, a tubular mandrel, a distortable packingelement surrounding the mandrel and arranged to be distorted by apressure within the bore of the mandrel, means for lowering the mandrelinto a well casing and locking the same therein, and removable means forclosing the lower en-d of the bore of the mandrel during the loweringoperation to prevent distortion of the element during such lowering.

9. A well device including, a packer having a pressure expansiblepacking element, means for anchoring the packer in position within thewell bore, and means to admit a fluid pressure to said element todistort the same into sealing position after the same is anchored, awell tubing extending axially through said packer and-being movable withrelation thereto when said packer is anchored to vary the elevation ofthe liquid inlet of said tubing in the well bore, said last named meansbeing carried by the tubing and being movable thereby after the mandrelis locked in the casing to open the lower end of the bore of the mandrelto permit the well pressure to distort the packing element.

l0. A well device including, an expansible packer having a passageextending therethrough for a well tubing, locking means for engaging theside wall of the well movably carried by the packer and connectedtherewith so as to be set and released thereby, and means detachablyconnected with the packer for coupling a well tubing thereto. wherebythe tubing may be utilized to move the packer in either direction and toset and release the packer or to be freely moved longitudinallydownwardly from its original pointof connection with the packer when thepack-er is-locked.

1l; In a well device, a packer, means for anand packer choring thepacker in astationary packing position in a well, and means arranged tobe attached to a well tubing for positively coupling the tubing with thepacker, said coupling means being readily detachable whereby 4the'packer may be set and released by longitudinal movement of the welltubing and also whereby the tubing may be freely moved longitudinallydownwardly from its original point of connection with the packer whensaid means is uncoupled, while said packer is anchored.

12. In a well device, a4 well tubing having a well fluid inlet, apacker, and means for anchoring said packer in a sealing position withina well and "against upward and downward displacement by the well iiuid,the well tubing extending axially through said packer and normallycarrying the same, means for positively connecting the tubing and thepacker adapted to be detached, whereby the tubing may be movedlongitudinally downwardly from its original point of connection with thepacker when said packer is anchored to vary the elevation of the liquidinlet of the tubing in said well bore.

13. A well device including, a duid-expanded tubular packing having abore therethrough for the passage oi a well tubing, a coupling collarhaving means for connecting it to a well tubing for movement thereby,means on the collar for detachably engaging it with the packer, and

means for packing off between the collar and the packer to shut 01T theadmission of well pressure fluid to the packer when the collar isengaged therewith:

14. A well deviceincluding, a mandrel, a packing means carried by themandrel, means for engaging the side wall of the well movably carried bythe mandrel and connected therewith so as to be set and releasedthereby, a well tubing extending axially through the mandrel and beingfreely movable therethrough, coacting means on the tubing and mandrelfor positively connecting these parts, said means being arranged fordetachment whereby the tubing may be utilized to set the well-engagingmeans and may' be disconnected and moved downwardly after such means isset so as to be moved therethrough. i

l5. A well device including, a well tubing, a ypacker surrounding saidtubing and normally ire-ely slidable relative thereto, means forconnesting the tubing and packer, whereby said tubing may be utilized tolower and raise the packer and to position the packer in a well bore,said means being arranged for detachment and means independent of theconnecting means for anchoring the packer in a sealing position in thewell bore, whereby the tubing may be detached from the packer and moveddownwardly with relation thereto when said packer is anchored in itssealed position.

16. A well device including, a well tubing, a packer surrounding thetubing and freely slidable thereon, means for locking the packer in asealing position in the well bore, a suspension collar carried by thetubing varranged to detachably connect the tubing and packer whereby thetubing may be utilized to position the packer in the well bore, saidcllar being adapted to be disconnected from the packer after said packeris locked in sealing position, whereby the tubing is free fromconnection with the packer and is freely movable axially therethrough ineither direction relative to thev locking means.

17. A well device wherein a tubular packer is packer adapted to bemounted on a well tubing,

means for anchoring the packer in a sealing position within the well,and a detachable connection between the packer and the tubing forfreeing the tubing from the -packer so that said -tubing may be movedfreely downwardly from its points of original connection with the packerwhen the latter is anchored and also whereby the packer may be moved ineither direction when said packer is not anchored and is connected withthe tubing.

19. In a well device, a well tubing having a well fluid inlet, a packerfor sealing on the well outside of the tubing, means for anchoring saidpacker against upward and downward displacement in the well and insealing position, the well tubing extending longitudinally through saidpacker and normally having a positive connection with the same andarranged to be disconnected from the packer so as to be free from anyconnection therewith when the same is anchored and movablelongitudinally to vary the elevation of the fluid inlet below saidpacker, and a iiuid excluding sealing between the packer land thetubing.

20. A well device including, an elongate packer, an anchoring meansmovably connected with the packer, means carried by the packer foroperating the anchoring means to set and release the same, a well tubingextending longitudinallyy through the packer, and means positivelyconnecting the packer and tubing together, whereby the tubing may beactuated to set and release the anchoring means and to actuate andposition the packer, said connecting means being arranged fordetachment, whereby the well tubing may be freely moved longitudinally,downwardly from its original point of connection with the packer whenthe packer is anchored and said means is detached from said packer.

21. A well device including, a vertically movable tubing, av packerslidably mounted on the tubing, means for anchoring saidl packer infixed position in a weil bore, a coupling element carried by the tubing,and having means for posiltively connecting the tubing with the packerfor moving said packer upwardly and downwardly through the well bore,said connecting means being readily detachable from the packer, wherebythe coupling element may be detached from the packer and the tubingmoved downwardly through the packer while said packer is anchored tomove said coupling element below the connecting means on the packerwhereupon the tubing may be moved in either direction.

22. In a well device, a packer, means for. anchoring the packer in astationary position in a Well, a well tubing extending axially throughthe packer, a coupling element on the packer, means carried by thetubing and disposed to be received within and detachably connected withthe coupling element for releasably coupling the tubing to the packer,whereby the packer may be moved with the tubing when the tubing andpacker are Vcoupled together, and co-engageable means on said packer andsaid tubing operable to set said anchoring means when said tubing ismoved to disconnect the tubing from the packer whereby the tubing may bemoved longitudinally of the packer when said means is uncoupled whilethe packer is'y anchored, said coupling element being movable below theconnecting means on the packer in either direction.

HERBERT C. OTIS.

